Fig. 4.

Distribution of retrogradely labeled neuronal cell bodies and anterogradely labeled cortical afferent fiber terminals in the brainstem and midbrain plotted on a series of coronal map sections. Each labeled neuron is represented by a red circle, and small clusters (three to five) of labeled terminals are represented by a green triangle. Each map represents labeled neurons and terminals in two or three sections from one animal. Maps are arranged from left to right in series beginning with the most caudal section; the anterior-posterior level of each section, relative to Bregma, is indicated below each map. The facial nucleus injection site was in the left hemisphere. Maps modified, with permission, from Paxinos and Watson (1998). Scale bar = 1 mm.